This is a CD Tower and HP SureStore CD-ROM Server. The tower is empty and supports up to 7 drives. Drives are sold separately.The tower supports up to seven HP SureStore 32x CD-ROM Drives (C2807A) or third-party SCSI-2 CD drives, CD changers, or DVD-ROM drives. Current CD changers typically hold 4 to 5 CD platters. (Up to 56 CD platters can be supported through Logical Unit Addressing [LUN] feature.) Non-HP drives require HP Mounting Hardware (C2998B).